Gravity-lock



(No Model.) 7 2 Sheets-Sheet 1.

J. D. MOORE.

GRAVITY LOCK. No. 557,595. Patented Apr. 7, 1896';

v1 Wm: XMWYWX W 01g .9. 02 g q g WQM mum" aaRAMAM. mo'mu-mawnsnmcmmn C (No Model.) 2 SheetsSheet 2. J. 1). MOORE.

GRAVITY LOOK.

No. 557,595. Patented Apr. 7, 1896.

NITED STATES PATENT OFFICE.

JAMES D. MOORE, OF ATLANTIC, IOW'A.

G RAVlTY-LOCK.

SPECIFICATION forming part of Letters Patent No. 557,595, dated April 7, 1896.

Application filed October 8,1895.

To aZZ whom it may concern.-

Be it known that I, JAMES D. MOORE, a citizen of the United States, residing at Atlantic, in the county of Cass and State of Iowa, have invented a new and useful Gravity-Lock, of which the following is a specification.

My invention consists in the arrangement and combination, with a gravity-latch, of improved locking mechanism therefor and in certain details in the construction of said locking mechanism, as hereinafter set forth, pointed out in my claim, and illustrated in the accompanying drawings, in which Figure 1 is a plan view of the complete lock with the cover removed, showing the bolt in a locked position. Fig. 2 is a like view showing the locking-block disengaged and the bolt in an unlocked position. Fig. 3 is a sectional view of the locking and bearing blocks, showing the tumbler and indicating the movement of the locking-block in dotted lines. Fig. 4 is a perspective view of the strikerplate. Fig. 5 is a detail perspective view of the bearing-block and guides for the key.

Referring to the accompanying drawings, the reference-letter A is used to designate the casing for the lock, provided with extensions 13 having internal screw-threaded bores to admit screws for the securance of the cover.

0 indicates holes for the insertion of screws to secure the entire look upon a door.

D indicates the bolt mounted on a pivot E.

G is a tumbler having a hole H for the admission of a spindle that is provided with a knob on each end to operate the bolt.

J is the looking-block pivotally mounted at K, having a detent L at its upper portion to engage the notch M in the bolt D, as required to securely hold the bolt in a locked position.

0 is the locking-tumbler, which is provided with a horizontally-extending curved slot P with vertical extensions P which are adapted to retain the pin R, which extends through the locking-block and through said slot.

S S are screws or rivets which pass through the slots S to prevent the tumbler from moving laterally.

T is the bearing-block, centrally slotted at T in which slot the tumbler 0 slides.

T T are guides for the key.

U U are escutcheons.

W designates the striker-plate and is of pe- Serial No. 564,986. (No model.)

culiar construction, it being adapted to receive a bolt from a right or left hand door.

Y (shown in Fig. 2) represents a device slidingly connected with the case to engage the detent L.

It is obvious that the bolt is pivoted eccentric to its center of gravity, that its inner end is heavier and would gravitate and cause the outer part thereof to be forced outwardly and upwardly, thereby looking a door upon the entrance of the bolt to the striking-plate. It is also obvious that the tumbler G, after having been provided with the ordinary knob and shaft, could be oscillated to such an extent as to cause the tumbler to elevate the bolt, thereby releasing the bolt from the strikingplate W. The locking-block J is pivoted at K and is provided with a detent L at its upper portion to engage the notch M in the bolt D to hold the same in a locked position. The tumbler O is moved vertically by the key to elevate it to a height sufficient to release the pin R from the vertical extension P of the slot P, which permits the locking-block J to be moved laterally and the detent L engage the notch M in the bolt D, and then the key strikes the lower shoulder of the tumbler and draws it downwardly, thus bringing the opposite vertical extension of the slot P over the pin R and holding it firmly locked. The key is reversed and the same operation takes place to release the detent L from the notch M and the knob and crank tumbler, as required, to release the bolt from the striking-plate.

Having thus described my invention,what I claim as new therein, and desire to secure by Letters Patent of the United States therefor,

The combination in a gravity-lock, having a pivoted bolt normally held outwardly by gravity and having a notch therein and means for withdrawing the bolt, of a locking device comprising a locking -block pivoted at its lower end and having a hook to enter said notch, a pin R on said locking-block, a locking-tumbler 0, having the slots 1? with extensions P, a bearing-block T having a slot T and two guides T substantially as set forth.

JAMES D. MOORE. lVitnesses G. A. MEREDITH, GEO. TosrEvIN. 

